Energy management method, system and railway wagon

Abstract

The application discloses an energy management method, system and railway freight car. The energy management system comprises a rectifier, a single-stage voltage converter, a battery and a controller. The rectifier is used for converting an input alternating voltage signal into a corresponding direct voltage signal. The controller is used for determining a charging mode of the battery. The single-stage voltage converter is used for performing corresponding voltage conversion on the direct voltage signal according to an indication of the charging mode, obtaining a target voltage signal, and charging the battery based on the target voltage signal. The application can realize effective management of battery charging in the railway freight car and efficient use of input electric energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, and in particular to an energy management method, system and railway freight car. BACKGROUND

[0002] At present, railway freight vehicles (referred to as railway freight cars) still belong to mechanical technology, and there is no electrification and informatization equipment. However, with the needs of fast logistics and vehicle operation safety monitoring of railway freight, power supply of railway freight cars has become a development need for future technology upgrading.

[0003] Therefore, how to supply power to railway freight cars is a problem to be solved. SUMMARY

[0004] Embodiments of the present application provide an energy management method, system and railway freight car, which can realize effective management of battery charging in the railway freight car and efficient use of input electric energy.

[0005] In one aspect, an embodiment of the present application provides an energy management system, which includes a rectifier, a single-stage voltage converter, a battery and a controller, wherein:

[0006] The rectifier is configured to convert an input alternating voltage signal into a corresponding direct voltage signal.

[0007] The controller is configured to determine a charging mode of the battery, and the charging mode includes any one of the following: an impedance matching mode, a voltage regulation mode and a low-power mode.

[0008] The single-stage voltage converter is configured to perform corresponding voltage conversion on the direct voltage signal according to an indication of the charging mode, to obtain a target voltage signal, and to charge the battery based on the target voltage signal.

[0009] Optionally, the controller is specifically configured to perform any one of the following steps:

[0010] When detecting that a battery voltage of the battery is less than or equal to a preset voltage, the charging mode of the battery is determined as the impedance matching mode.

[0011] When detecting that the battery voltage of the battery is greater than the preset voltage, the charging mode of the battery is determined as the voltage regulation mode.

[0012] When detecting that an energy harvesting device in the energy management system does not emit power, the charging mode of the battery is determined as the low-power mode.

[0013] Optionally, the system further includes a current sensor, a gate driver, a first voltage stabilizing regulator and a second voltage stabilizing regulator, wherein:

[0014] The first voltage regulator is configured to obtain an input voltage signal from the battery side and supply power to the gate driver.

[0015] The second voltage regulator is configured to obtain an input voltage signal from the battery side and supply power to the controller.

[0016] The current sensor is configured to detect a corresponding output current.

[0017] The controller is configured to determine a charging mode of the battery according to the output current detected by the current sensor.

[0018] Optionally, the charging mode is an impedance matching mode, and the single-stage voltage converter is specifically configured to:

[0019] When the control signal from the controller is lower than a preset threshold, a set resistance value is simulated in the impedance matching mode, and the first voltage regulator and the second voltage regulator are used to supply power to the gate driver and the current sensor to work, so that the transmission power of the energy harvesting device in the energy management system reaches a preset power threshold.

[0020] Optionally, the controller is specifically configured to perform any one of the following steps:

[0021] When it is detected that the output current is less than or equal to a first preset current, it is determined that the charging mode of the battery is an impedance matching mode.

[0022] When it is detected that the output current is greater than the first preset current, it is determined that the charging mode of the battery is a voltage regulation mode.

[0023] When it is detected that the output current is less than or equal to a second preset current, it is determined that the charging mode of the battery is a low-power mode.

[0024] The second preset current is less than the first preset current.

[0025] Optionally, the system further comprises a battery monitoring module, wherein:

[0026] The battery monitoring module is configured to monitor the health of the battery.

[0027] In another aspect, an embodiment of the present application provides an energy management method, which is applied to the energy management system as described above, and the method comprises:

[0028] Determining a charging mode of the battery, the charging mode comprising any one of the following: an impedance matching mode, a voltage regulation mode, and a low-power mode.

[0029] convert the input alternating voltage signal into a corresponding direct voltage signal;

[0030] perform corresponding voltage conversion on the direct voltage signal according to the indication of the charging mode to obtain a target voltage signal, and charge the battery based on the target voltage signal.

[0031] Optionally, the determining the charging mode of the battery comprises any one of the following steps:

[0032] when detecting that the battery voltage of the battery is less than or equal to a preset voltage, determining the charging mode of the battery as an impedance matching mode;

[0033] when detecting that the battery voltage of the battery is greater than a preset voltage, determining the charging mode of the battery as a voltage adjustment mode;

[0034] when detecting that the energy harvesting device in the energy management system does not emit power, determining the charging mode of the battery as a low-power mode.

[0035] Optionally, the determining the charging mode of the battery comprises any one of the following steps:

[0036] when detecting that the output current is less than or equal to a first preset current, determining the charging mode of the battery as an impedance matching mode;

[0037] when detecting that the output current is greater than a first preset current, determining the charging mode of the battery as a voltage adjustment mode;

[0038] when detecting that the output current is less than or equal to a second preset current, determining the charging mode of the battery as a low-power mode;

[0039] wherein the second preset current is less than the first preset current.

[0040] In another aspect, an embodiment of the present application provides a railway wagon, comprising a processor, a memory, a communication interface and a bus; the processor, the memory and the communication interface are connected through the bus and complete communication with each other; the memory stores executable program code; the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the energy management method as described above.

[0041] In another aspect, an embodiment of the present application provides a computer readable storage medium, which stores a program, and when the program runs in a railway wagon, executes the energy management method as described above.

[0042] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: the present application provides an energy management system including a rectifier, a single-stage voltage converter, a battery and a controller, wherein the rectifier is configured to convert an input alternating voltage signal into a corresponding direct voltage signal; the controller is configured to determine a charging mode of the battery, the charging mode including any one of impedance matching mode, voltage regulation mode and low power mode; and the single-stage voltage converter is configured to perform corresponding voltage conversion on the direct voltage signal according to an indication of the charging mode, to obtain a target voltage signal, and to charge the battery based on the target voltage signal. In the above solution, the present application can convert the input energy signal in the system into an electric energy (voltage) signal to charge the battery, thereby achieving effective management of battery charging and efficient use of electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0044] Figure 1 is a structural schematic diagram of an energy management system provided by the prior art.

[0045] Figure 2 is a structural schematic diagram of an energy management system provided by the present application.

[0046] Figure 3 is a structural schematic diagram of another energy management system provided by the present application.

[0047] Figure 4 is a structural schematic diagram of another energy management system provided by the present application.

[0048] Figure 5 is a flow schematic diagram of an energy management method provided by the present application.

[0049] Figure 6 is a structural schematic diagram of a railway wagon provided by the present application. DETAILED DESCRIPTION

[0050] The applicant also found during the process of filing the present application that power supply for railway wagons has become a development need for future upgrading, which has led to the exploration of various power supply technologies for railway wagons. Among them, the use of vibration during the operation of railway wagons to recover the energy of the vehicle suspension system not only consumes the traction power of the wagon, but also effectively utilizes the invalid energy and converts it into electrical energy to power the electrical equipment of the vehicle, which can realize the electrification and intelligentization of railway wagons. However, due to the randomness of the vibration during the operation of the railway wagon, it is difficult to directly utilize the collected energy, so the energy collected by the energy collection device needs to be converted into electrical energy, and at the same time needs to be effectively managed to realize efficient use of electrical energy.

[0051] Please refer to Figure 1 , which is a structural schematic diagram of an energy management system provided by the prior art. As shown in Figure 1 , the energy management system includes an energy collection device (also referred to as a power generation device) 101, a rectifier 102, an impedance matching module 103, a battery charging module 104 and a battery 105. Among them:

[0052] The present energy management system adopts a two-stage voltage (DC-DC) converter, which includes an impedance matching stage for maximum power transmission and a battery charging stage for adjusting voltage to charge and protect the battery, as shown in Figure 1 . However, the control mechanism of the traditional two-stage DC-DC converter is relatively simple, and such a structure leads to low efficiency due to two-stage power conversion.

[0053] The embodiments of the present application provide an energy management system to solve the technical problems of low energy management efficiency in the prior art.

[0054] The technical scheme of the embodiments of the present application is to solve the above technical problems, and the general idea is as follows:

[0055] An energy management system, the energy management system includes a rectifier, a single-stage voltage converter, a battery and a controller, wherein:

[0056] The rectifier is configured to convert an input alternating voltage signal into a corresponding direct voltage signal;

[0057] The controller is configured to determine a charging mode of the battery, the charging mode including any one of the following: an impedance matching mode, a voltage adjustment mode and a low power mode;

[0058] The single-stage voltage converter is configured to perform corresponding voltage conversion on the direct voltage signal according to the indication of the charging mode, to obtain a target voltage signal, and to charge the battery based on the target voltage signal.

[0059] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0060] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0061] Please see Figure 2 This is a schematic diagram of an energy management system provided in an embodiment of this application. Figure 2 The energy management system shown includes: an energy harvesting device 201, a rectifier 202, a single-stage voltage converter 203, a battery 204, and a controller 205. The energy harvesting device 201, the rectifier 202, the single-stage voltage converter 203, and the battery 204 are electrically connected in sequence, and the controller 205 is electrically connected to the single-stage voltage converter 203. Under the control of the controller 205, the single-stage voltage converter 203 can perform impedance matching and voltage regulation functions, thereby enabling charging and protection of the battery 204. To minimize the power consumption of the single-stage voltage converter 203, the converter 203 proposed in this application also has / supports a low-power mode function for power / energy management of railway freight cars.

[0062] In some embodiments, the energy harvesting device 201 is used to harvest energy from the vibration recovery vehicle suspension system during railway freight car operation. This energy is represented as an AC signal, also known as an AC voltage signal. The rectifier 202 is used to convert the (input) AC voltage signal from the energy harvesting device 201 into a corresponding DC voltage signal; in other words, the rectifier 202 is an AC-DC rectifier. The controller 205 is used to determine the charging mode of the battery. The charging mode is a system-defined configuration, and the implementation method for determining the charging mode is detailed below. The charging mode includes, but is not limited to, any of the following: impedance matching mode, voltage regulation mode, low power mode, or other system-defined modes.

[0063] Correspondingly, the single-stage voltage converter 203 is configured to convert the direct current voltage signal into a corresponding target voltage signal according to an indication of the charging mode, so that the voltage value of the target voltage signal meets the charging requirement of the battery 204 without damaging the battery 204. Further, the battery 204 can be charged based on the target voltage signal to achieve efficient use of energy and charging protection of the battery 204.

[0064] In some embodiments, the specific implementation of the controller 205 determining the charging mode of the battery includes but is not limited to any one of the following, for example: when the battery voltage of the battery is detected to be less than or equal to a preset voltage, the application can determine that the charging mode of the battery is the impedance matching mode. Alternatively, when the battery voltage of the battery is detected to be greater than the preset voltage, the application can determine that the charging mode of the battery is the voltage regulation mode. Alternatively, when the energy harvesting device 201 is detected to not emit power or not work, the application can determine that the charging mode of the battery is the low-power mode. The preset voltage is a system or user-defined setting, for example, 80% of the maximum battery voltage of the battery, and the application is not limited.

[0065] Please refer to Figure 3 , another structure diagram of an energy management system provided by the application is shown. As Figure 3 shown, the energy management system includes: an energy harvesting device 201, a rectifier 202, a single-stage voltage converter 203, a battery 204, a controller 205, a first voltage regulator (also referred to as a first voltage converter) 206, a second voltage regulator (also referred to as a second voltage converter) 207, and a load 208. Optionally, the system can also include a battery monitoring module 209. Wherein, the specific introduction of the energy harvesting device 201, the rectifier 202, the single-stage voltage converter 203, the battery 204 and the controller 205 can be correspondingly referred to the foregoing Figure 2 introduction of the embodiments, which will not be repeated here. The battery 204 is electrically connected to the first voltage regulator 206, the second voltage regulator 207 and the battery monitoring module 209 respectively. The first voltage regulator 206 and the second voltage regulator 207 are electrically connected to the load 208 respectively to supply power to the load 208.

[0066] In some embodiments, the first voltage regulator 206 and the second voltage regulator 207 can respectively obtain an input voltage signal from the battery 204, and perform voltage conversion processing of boosting / voltage reduction on the input voltage signal, and then supply power to the load 208 to protect the load 208 from being damaged by overvoltage.

[0067] In some embodiments, the battery monitoring module 209 is used to perform health monitoring and health management on the battery 204, such as monitoring the remaining power of the battery and monitoring the battery's lifespan, etc., which is not limited in this application.

[0068] Understandably, when the energy harvesting device 201 is matched with a resistive load, it can deliver maximum power. In impedance matching mode, the single-stage DC-DC voltage converter 203 can simulate the resistance of the load 208 to obtain maximum power from the energy harvesting device 201. In voltage regulation mode, the single-stage DC-DC voltage converter 203 prevents the battery from overcharging by regulating its output voltage. The battery voltage switches between impedance matching and voltage regulation modes. When the battery voltage is less than 80% of the maximum battery voltage, i.e., the battery is not fully charged, the single-stage DC-DC voltage converter 203 operates in impedance matching mode to obtain maximum power. When the battery voltage is greater than 80% of the maximum battery voltage, i.e., the battery is almost fully charged, the energy management system operates in voltage regulation mode to prevent the battery from overcharging. When the energy harvesting device 201 does not generate any power, the controller 205 sets a low-power mode to shut down the entire circuit and reduce system power loss.

[0069] It should be noted that the internal structure of the energy harvesting device 201, rectifier 202, single-stage voltage converter 203, battery 204, controller 205, first voltage regulator 206, second voltage regulator 207, and load 208 involved in this application is not limited in this application. For example, the rectifier 202 may be a three-phase bridge rectifier, etc., and this application does not limit it.

[0070] Please see also Figure 4 This is a schematic diagram of another energy management system provided in an embodiment of this application. Figure 4 The system shown includes a rectifier 202, a single-stage voltage converter 203, a battery 204, a controller 205, a first voltage regulator 206, a second voltage regulator 207, a current sensor 210 (also referred to as an input current sensor), and a gate driver 211. This application does not limit the internal structure of each component in this system. For example, the rectifier 202 can be a three-phase bridge rectifier, the controller 205 can be, for example, a digital microcontroller, and the voltage regulators 206 / 207 can be, for example, linear low-power voltage regulators, or voltage converters, etc.

[0071] in:

[0072] In some embodiments, the first voltage regulator 206 is configured to obtain an input voltage signal from the battery 204 to power the gate driver 211. The second voltage regulator 207 is configured to obtain an input voltage signal from the battery 204 to power the controller 205. The current sensor 210 is configured to detect a corresponding output current, and the controller 205 is configured to determine a charging mode of the battery 205 based on the output current detected by the current sensor 210.

[0073] In a specific embodiment, in the impedance matching mode, the single-stage voltage converter 203 is configured to simulate a set resistance value in the impedance matching mode when the control signal from the controller 205 is below a preset threshold value, and the first voltage regulator 206 and the second voltage regulator 207 are configured to power the gate driver 211 and the current sensor 210 to operate, so that the transmission power of the energy harvesting device 201 in the energy management system reaches a preset power threshold value, for example, the transmission power reaches a maximum transmission power, etc.

[0074] In some embodiments, the specific implementation of the controller 205 determining the charging mode of the battery includes but is not limited to any one of the following, for example: when the controller 205 detects that the output current of the current sensor 210 is less than or equal to a first preset current, the controller 205 can determine that the charging mode of the battery is the impedance matching mode. Alternatively, when the controller 205 detects that the output current is greater than the first preset current, the controller 205 can determine that the charging mode of the battery is the voltage regulation mode. Alternatively, when the controller 205 detects that the output current is less than or equal to a second preset current, the controller 205 can determine that the charging mode of the battery is the low-power mode. The second preset current is less than the first preset current, and the first preset current and the second preset current can be set by the system or the user, for example, the second preset current can be 0. At this time, when the controller 205 detects that the current detected by the current sensor 210 is 0, the controller 205 can determine that the charging mode of the battery is the low-power mode; otherwise, when there is current (i.e., the current is not 0), the controller 205 can determine the charging mode of the battery according to the current detected by the current sensor 210. The controller 205 does not limit the impedance matching mode or the voltage regulation mode.

[0075] In a specific implementation, the digital microcontroller 205 is configured to determine the operation mode of the energy management system, such as the impedance matching mode, the voltage regulation mode, or the low power mode, etc., and the controller 205 is configured to control the single-stage DC-DC voltage converter 203 to perform the required operation, such as the voltage conversion, etc. The digital microcontroller 205 is internally provided with a 14-bit analog-to-digital converter (ADC) for detecting the output voltage of the buck-boost converter (i.e., the voltage converter) or the battery voltage. Further, the application can connect a resistive voltage divider network (not shown) to the output voltage node (e.g., the output voltage node corresponding to the controller 205) according to the maximum operating voltage detected by the controller 205, and then feed back to the analog-to-digital converter (ADC) of the controller 205. In the impedance matching mode, the resistance value of the analog fixed load 208 is matched by the single-stage DC-DC voltage converter 203, and the control signal from the digital microcontroller 205 is insufficient to turn on / off the corresponding power transistor, at which time the application can use a gate driver 211, and a linear low power voltage regulator 206 obtains an input voltage signal from the battery 205 to generate a voltage output for powering the gate driver 211 and the current sensor 210. Another linear low power voltage regulator 207 obtains an input voltage signal from the battery 205 to generate another voltage output for powering the digital microcontroller 205. The input current sensor 210 is configured to detect the current generated in the low power mode, and the digital microcontroller 205 reads the output current of the current sensor 210 to determine the mode between the low power mode and the active mode, and specifically determine the voltage regulation mode or the impedance matching mode.

[0076] It should be noted that the above-mentioned Figures 2-4 The energy management system provided in the embodiments can be implemented alone or in combination with any two or more systems, and the application does not make any limitation. In other words, the energy management system provided by the application can include Figures 2-4 a combination of components in any one or more of the figures.

[0077] The application provides an energy management system including a rectifier, a single-stage voltage converter, a battery, and a controller, wherein the rectifier is configured to convert an input alternating voltage signal into a corresponding direct voltage signal; the controller is configured to determine a charging mode of the battery, the charging mode including any one of the following: an impedance matching mode, a voltage regulation mode, and a low power mode; and the single-stage voltage converter is configured to perform a corresponding voltage conversion on the direct voltage signal according to the indication of the charging mode to obtain a target voltage signal, and charge the battery based on the target voltage signal. In the above scheme, the application can convert the energy signal input into the system into an electric energy (voltage) signal to charge the battery, thereby achieving effective management of battery charging and efficient use of electric energy.

[0078] Based on the same inventive concept, another embodiment of the present application provides a railway freight car corresponding to the energy management system described in the embodiments of the present application and a method for implementing the energy management system.

[0079] Please refer to Figure 5 is a flowchart of an energy management method provided by the embodiments of the present application. As shown in the method is applied to the energy management system described in the embodiments above Figure 5 Figures 2-4 The method includes the following implementation steps:

[0080] S501, determine the charging mode of the battery, the charging mode including any one of the following: impedance matching mode, voltage regulation mode and low power mode.

[0081] The controller in the energy management system of the present application can first determine the charging mode of the system battery, which includes but is not limited to any one of the following: impedance matching mode, voltage regulation mode, low power mode or other system defined mode, etc.

[0082] S502, convert the input AC voltage signal into a corresponding DC voltage signal.

[0083] The present application converts the input AC voltage signal into a corresponding DC voltage signal through a rectifier. It should be noted that the execution order of steps S501 and S502 of the present application is not limited, for example, the present application can execute step S502 first and then execute step S501, etc.

[0084] S503, according to the indication of the charging mode, the DC voltage signal is subjected to corresponding voltage conversion to obtain a target voltage signal, so as to charge the battery based on the target voltage signal.

[0085] The present application converts the DC voltage signal to obtain a target voltage signal through a single-stage voltage converter under the charging mode, so as to charge the system battery based on the target voltage signal.

[0086] Some specific implementations related to step S501 are introduced below.

[0087] ​In an embodiment, the embodiments of the application for determining the charging mode of the battery include but are not limited to any one of the following, for example: the application can determine the charging mode of the battery as the impedance matching mode when detecting that the battery voltage of the battery is less than or equal to a preset voltage. Alternatively, the application can determine the charging mode of the battery as the voltage regulation mode when detecting that the battery voltage of the battery is greater than the preset voltage. Alternatively, the application can determine the charging mode of the battery as the low-power mode when detecting that the energy harvesting device 201 does not emit power or does not work. Wherein, the preset voltage is set by the system or the user, for example, 80% of the maximum battery voltage of the battery, etc., which is not limited by the application.

[0088] In another embodiment, the embodiments of the application for determining the charging mode of the battery include but are not limited to any one of the following, for example: the application can determine the charging mode of the battery as the impedance matching mode when detecting that the output current of the current sensor 210 is less than or equal to a first preset current. Alternatively, the application can determine the charging mode of the battery as the voltage regulation mode when detecting that the output current is greater than the first preset current. Alternatively, the application can determine the charging mode of the battery as the low-power mode when detecting that the output current is less than or equal to a second preset current. Wherein, the second preset current is less than the first preset current, and the first preset current and the second preset current can be set by the system or the user, for example, the second preset current can be 0, etc., which is not limited by the application.

[0089] For the content not introduced or described in the embodiments of the application, please refer to the foregoing Figures 2-4 introduction in the embodiments, which is not limited by the application.

[0090] Please see Figure 6, which is a structural schematic diagram of a railway wagon provided by the embodiments of the application. As shown in Figure 6 The railway wagon 60 shown includes at least one processor 601, a communication interface 602, a user interface 603 and a memory 604, and the processor 601, the communication interface 602, the user interface 603 and the memory 604 can be connected through a bus or other means. The embodiments of the application take the connection through the bus 605 as an example. Wherein,

[0091] The processor 601 can be a general-purpose processor, such as a central processing unit (CPU).

[0092] The communication interface 602 can be a wired interface (e.g., an Ethernet interface) or a wireless interface (e.g., a cellular network interface or a wireless local area network interface) for communicating with other terminals or websites. In the embodiments of the present application, the communication interface 602 is specifically used to obtain an input voltage signal and the like.

[0093] The user interface 603 can be a touch panel, including a touch screen and a touch screen, for detecting operation instructions on the touch panel. The user interface 603 can also be a physical button or a mouse. The user interface 603 can also be a display screen for outputting and displaying images or data.

[0094] The memory 604 can include a volatile memory (Volatile Memory), such as a random access memory (Random Access Memory, RAM). The memory can also include a non-volatile memory (Non-Volatile Memory), such as a read-only memory (Read-Only Memory, ROM), a flash memory, a hard disk (Hard Disk Drive, HDD) or a solid state disk (Solid-State Drive, SSD). The memory 604 can also include a combination of the above types of memory. The memory 604 is used to store a set of program codes, and the processor 601 is used to call the program codes stored in the memory 604 to execute the related steps in the method embodiments as described above.

[0095] Since the railway wagon described in the present embodiment is the railway wagon used to implement the method in the present application, based on the method described in the present application, those skilled in the art can understand the specific implementation of the railway wagon of the present embodiment and its various forms, so the present application does not describe in detail how the railway wagon implements the method in the present application. As long as the railway wagon used to implement the method in the present application is implemented by those skilled in the art, it belongs to the scope of the present application.

[0096] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: the present application provides an energy management system including a rectifier, a single-stage voltage converter, a battery, and a controller, wherein the rectifier is configured to convert an input alternating voltage signal into a corresponding direct voltage signal; the controller is configured to determine a charging mode of the battery, the charging mode including any one of impedance matching mode, voltage regulation mode, and low power mode; and the single-stage voltage converter is configured to perform corresponding voltage conversion on the direct voltage signal according to an indication of the charging mode, to obtain a target voltage signal, and to charge the battery based on the target voltage signal. In the above solution, the present application can convert the energy signal input in the system into an electric energy (voltage) signal to charge the battery, thereby achieving effective management of battery charging and efficient use of electric energy.

[0097] Those skilled in the art will understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0098] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce a device that implements the flow Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The means for performing the functions specified in one or more flows and / or blocks.

[0099] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction means, which implements the flow Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The means for performing the functions specified in one or more flows and / or blocks.

[0100] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 one or more flowcharts and / or blocks

[0101] Although preferred embodiments of the application have been described herein, substitutions and modifications of these preferred embodiments made by those skilled in the art are to be considered within the scope of the application. Therefore, it is intended that the appended claims be construed to include all such substitutions and modifications.

[0102] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. An energy management system, characterized by, The energy management system comprises a rectifier, a single-stage voltage converter, a battery and a controller, wherein: The rectifier is configured to convert an input alternating voltage signal into a corresponding direct voltage signal; The controller is configured to determine a charging mode of the battery, the charging mode comprising an impedance matching mode, a voltage regulation mode and a low power mode; The single-stage voltage converter is configured to perform corresponding voltage conversion on the direct voltage signal according to an indication of the charging mode, to obtain a target voltage signal, and to charge the battery based on the target voltage signal; The system further comprises a current sensor, a gate driver, a first voltage regulator and a second voltage regulator, wherein: The first voltage regulator is configured to obtain an input voltage signal from the battery side and supply power to the gate driver; The second voltage regulator is configured to obtain an input voltage signal from the battery side and supply power to the controller; The current sensor is configured to detect a corresponding output current; The controller is configured to determine the charging mode of the battery according to the output current detected by the current sensor; The controller is specifically configured to perform the following steps: When it is detected that the battery voltage of the battery is less than or equal to a preset voltage, it is determined that the charging mode of the battery is the impedance matching mode; When it is detected that the battery voltage of the battery is greater than the preset voltage, it is determined that the charging mode of the battery is the voltage regulation mode; When it is detected that the energy harvesting device in the energy management system does not emit power, it is determined that the charging mode of the battery is the low power mode; Alternatively, When it is detected that the output current is less than or equal to a first preset current, it is determined that the charging mode of the battery is the impedance matching mode; When it is detected that the output current is greater than the first preset current, it is determined that the charging mode of the battery is the voltage regulation mode; When it is detected that the output current is less than or equal to a second preset current, it is determined that the charging mode of the battery is the low power mode; The second preset current is less than the first preset current; When the charging mode is the impedance matching mode, the single-stage voltage converter is specifically configured to: When the control signal from the controller is lower than a preset threshold, a set resistance value is simulated in the impedance matching mode, and the first voltage regulator and the second voltage regulator are used to supply power to the gate driver and the current sensor for working, so that the emission power of the energy harvesting device in the energy management system reaches a preset power threshold.

2. The system of claim 1, wherein, The system further comprises a battery monitoring module, wherein: The battery monitoring module is configured to monitor the health of the battery.

3. An energy management method, characterized by, The method is applied to the energy management system as claimed in claim 1 or 2, and the method comprises: determining a charging mode of a battery, the charging mode comprising an impedance matching mode, a voltage regulation mode and a low power mode; converting an input alternating voltage signal into a corresponding direct voltage signal; performing corresponding voltage conversion on the direct voltage signal according to an indication of the charging mode, to obtain a target voltage signal, and charging the battery based on the target voltage signal.

4. The method of claim 3, wherein, The determination of the charging mode of the battery comprises: determining the charging mode of the battery as an impedance matching mode when detecting that the battery voltage of the battery is less than or equal to a preset voltage; determining the charging mode of the battery as a voltage regulation mode when detecting that the battery voltage of the battery is greater than a preset voltage; determining the charging mode of the battery as a low power mode when detecting that the energy harvesting device in the energy management system does not emit power.

5. The method of claim 3, wherein, The determining the charging mode of the battery comprises: determining the charging mode of the battery as an impedance matching mode when detecting that the output current is less than or equal to a first preset current; determining the charging mode of the battery as a voltage regulation mode when detecting that the output current is greater than the first preset current; determining the charging mode of the battery as a low power mode when detecting that the output current is less than or equal to a second preset current; wherein the second preset current is less than the first preset current.

6. A railway wagon characterised in that, The railway wagon comprises a processor, a memory, a communication interface and a bus; the processor, the memory and the communication interface are connected through the bus and complete communication with each other; the memory stores executable program codes; the processor runs programs corresponding to the executable program codes by reading the executable program codes stored in the memory, so as to execute the energy management method as claimed in any one of claims 3-5.

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